Wood Fillers for Windows

A range of window fillers for filling gaps, cracks and holes in wooden window frames and sills in preparation for refinishing with an interior wood oil, stain or other suitable wood finish. These strong and effective wood fillers will suit any project, whether softwood or hardwood window sills, new or old wooden window frames.

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Displaying 26 products

  4.4/5.0  (65)
The strongest two-part wood filler we know. Available in many wood shades.
  • 15 mins drying time
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Available in 30ml, 750ml
  4.2/5.0  (67)
A strong, fast drying two-part wood filler that can be stained.
  • 30 mins drying time
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Available in 275g, 550g, 1kg
  4.9/5.0  (84)
Quick spot repairs to your window frame - just scrape and fill with these wax filler sticks.
  • 2 mins drying time
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Available in 40g
  5.0/5.0  (31)
Soaks deep in to rotten timber to strengthen and reinforce softened wood.
  • 1 coat
  • 2 hrs drying time
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Available in 250ml, 500ml
  4.5/5.0  (7)
Ideal for small repairs. Suitable for interior and exterior use.
  • 2 hrs drying time
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Available in 250g, 465g, 930g
  5.0/5.0  (4)
For repairing finished interior wooden furniture. Fills small to medium holes, cracks and scratches. Quick drying and easy to use.
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Available in 50g
  4.9/5.0  (7)
A water-based, multi-purpose wood filler for interior and exterior use.
  • 2 hrs drying time
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Available in 150g
  5.0/5.0  (8)
A high performance, 2 part wood filler for repairing damage caused by wet rot and for major joinery repairs.
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Available in 250g, 500g, 750g
A tough, durable, flexible wood filler for small repairs. Suitable for interior and exterior use.
  • 2 hrs drying time
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Available in 250ml, 310ml, 500ml
Special Offer
  5.0/5.0  (1)
A quick drying flexible filler for emergency and permanent repairs on small to medium areas of interior and exterior wood
  • 1 coat
  • 4 hrs drying time
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Available in 400ml
  4.7/5.0  (5)
A high strength, two pack wood filler ideal for filling larger areas. Rapid curing and superb adhesion.
  • 30 mins drying time
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Available in 350ml
A multipurpose UV and moisture resistant glazing sealant for interior and exterior windows. Durable, flexible and does not shrink
  • 1 coat
  • 2 hrs drying time
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Available in 290ml
Special Offer
  4.0/5.0  (1)
A 2-part, flexible filler for emergency and permanent repairs on large areas of interior and exterior wood
  • 1 coat
  • 16 hrs drying time
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Available in 400ml
Special Offer
  4.0/5.0  (2)
A very fast drying flexible filler for quick emergency and permanent repairs on small areas of interior and exterior wood
  • 1 coat
  • 1 hr drying time
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Available in 300ml
A 2-part repair resin for most types of interior and exterior wood. Ideal for use in cold weather
  • 1 coat
  • 15 hrs drying time
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Available in 400ml
Designed for external facing glazing of doors and frames and is suitable for both wooden and metal surfaces
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Available in 1kg, 2kg
  5.0/5.0  (1)
A strong and flexible wood repair filler that can be used both indoors and outside
  • 4 hrs drying time
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Available in 125ml
A strong and flexible wood repair filler that can be used both indoors and outside
  • 12 hrs drying time
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Available in 1kg
An Interior and Exterior Filler that can be applied to a multitude of surfaces
  • 48 hrs drying time
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Available in 1kg
A universal repair paste for all types of wood repairs. Year round use on interior and exterior windows, doors and more.
  • 1 coat
  • 12 hrs drying time
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Available in 400ml
A 2-in-1 fast drying, flexible filler for quick emergency and permanent repairs on small areas of interior and exterior wood
  • 1 coat
  • 1 hr drying time
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Available in 150ml
  5.0/5.0  (2)
A 2-in-1 flexible filler for emergency and permanent repairs on small areas of interior and exterior wood
  • 1 coat
  • 4 hrs drying time
More info
Available in 150ml
A very fast drying epoxy filler for fine spot repairs on interior and exterior wood, such as cracks and screw holes
  • 1 coat
  • 30 mins drying time
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Available in 150ml
An introductory starter kit to wood repair, with everything needed to start using the Repair Care system
A flexible sealant ideal for gaps between walls and skirting boards, windows and door frames
  • 24 hrs drying time
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Available in 310ml
A sealant that is immediately paintable after being applied and provides a smooth clean surface.
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Available in 310ml